Grade 21 Titanium vs. ASTM B628 Ag-Cu
Grade 21 titanium belongs to the titanium alloys classification, while ASTM B628 Ag-Cu belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.
For each property being compared, the top bar is grade 21 titanium and the bottom bar is ASTM B628 Ag-Cu.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 140 | |
| 83 |
| Elongation at Break, % | 9.0 to 17 | |
| 1.1 to 17 |
| Poisson's Ratio | 0.32 | |
| 0.36 |
| Shear Modulus, GPa | 51 | |
| 31 |
| Shear Strength, MPa | 550 to 790 | |
| 210 to 430 |
| Tensile Strength: Ultimate (UTS), MPa | 890 to 1340 | |
| 350 to 760 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 140 |
| Melting Completion (Liquidus), °C | 1740 | |
| 780 |
| Melting Onset (Solidus), °C | 1690 | |
| 780 |
| Specific Heat Capacity, J/kg-K | 500 | |
| 280 |
| Thermal Expansion, µm/m-K | 7.1 | |
| 19 |
Otherwise Unclassified Properties
| Density, g/cm3 | 5.4 | |
| 10 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 | |
| 4.6 |
| Stiffness to Weight: Bending, points | 32 | |
| 14 |
| Strength to Weight: Axial, points | 46 to 69 | |
| 9.5 to 21 |
| Strength to Weight: Bending, points | 38 to 50 | |
| 11 to 18 |
| Thermal Shock Resistance, points | 66 to 100 | |
| 16 to 34 |
Alloy Composition
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| Aluminum (Al), % | 2.5 to 3.5 | |
| 0 to 0.0050 |
| Cadmium (Cd), % | 0 | |
| 0 to 0.050 |
| Carbon (C), % | 0 to 0.050 | |
| 0 |
| Copper (Cu), % | 0 | |
| 26.6 to 29 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.4 | |
| 0 to 0.050 |
| Lead (Pb), % | 0 | |
| 0 to 0.030 |
| Molybdenum (Mo), % | 14 to 16 | |
| 0 |
| Nickel (Ni), % | 0 | |
| 0 to 0.010 |
| Niobium (Nb), % | 2.2 to 3.2 | |
| 0 |
| Nitrogen (N), % | 0 to 0.030 | |
| 0 |
| Oxygen (O), % | 0 to 0.17 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.030 |
| Silicon (Si), % | 0.15 to 0.25 | |
| 0 |
| Silver (Ag), % | 0 | |
| 71 to 73 |
| Titanium (Ti), % | 76 to 81.2 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 0 to 0.060 |
| Residuals, % | 0 to 0.4 | |
| 0 to 0.21 |